GB724582A - Improvements in or relating to circuit arrangements for use in carrier-wave telephone systems - Google Patents
Improvements in or relating to circuit arrangements for use in carrier-wave telephone systemsInfo
- Publication number
- GB724582A GB724582A GB9237/53A GB923753A GB724582A GB 724582 A GB724582 A GB 724582A GB 9237/53 A GB9237/53 A GB 9237/53A GB 923753 A GB923753 A GB 923753A GB 724582 A GB724582 A GB 724582A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- signal
- intelligence
- signalling
- fed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
- H01J1/02—Main electrodes
- H01J1/13—Solid thermionic cathodes
- H01J1/14—Solid thermionic cathodes characterised by the material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J1/00—Frequency-division multiplex systems
- H04J1/02—Details
- H04J1/14—Arrangements providing for calling or supervisory signals
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
- Transceivers (AREA)
- Interface Circuits In Exchanges (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL724582X | 1952-04-09 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB724582A true GB724582A (en) | 1955-02-23 |
Family
ID=19817747
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9237/53A Expired GB724582A (en) | 1952-04-09 | 1953-04-02 | Improvements in or relating to circuit arrangements for use in carrier-wave telephone systems |
Country Status (5)
Country | Link |
---|---|
US (1) | US2920144A (it) |
DE (1) | DE916184C (it) |
FR (1) | FR1074361A (it) |
GB (1) | GB724582A (it) |
NL (1) | NL92529C (it) |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2355642A (en) * | 1942-08-25 | 1944-08-15 | Western Union Telegraph Co | System for the conversion and retransmission of control signals |
BE454346A (it) * | 1943-03-08 | |||
FR963277A (it) * | 1947-02-21 | 1950-07-05 | ||
US2775647A (en) * | 1950-09-28 | 1956-12-25 | Hartford Nat Bank & Trust Co | Single sideband carrier-wave telephone system |
-
0
- NL NL92529D patent/NL92529C/xx active
-
1953
- 1953-04-01 US US346094A patent/US2920144A/en not_active Expired - Lifetime
- 1953-04-02 GB GB9237/53A patent/GB724582A/en not_active Expired
- 1953-04-05 DE DEN6996A patent/DE916184C/de not_active Expired
- 1953-04-07 FR FR1074361D patent/FR1074361A/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE916184C (de) | 1954-08-05 |
FR1074361A (fr) | 1954-10-05 |
US2920144A (en) | 1960-01-05 |
NL92529C (it) |
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